American Dryer Corp MLS-460 manual 3CR CRB Not Used, Sprinkler Circuit Components

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The following information will first describe the sprinkler circuit components and then provide a circuit description. Please refer to the MLS-460 ladder diagram (which is supplied with the machine) as the following is described.

SPRINKLER CIRCUIT COMPONENTS

•OL12 (overload #12) is a 1.6-amp magnetic and thermal overload device set 1-amp. Its function is to protect and the line voltage of the sprinkler circuit.

•T1 is a control transformer whose primary depends on the system line voltage (i.e., 208 VAC, 240 VAC, 380 VAC, 416 VAC, and 480 VAC). Refer to system’s nameplate. Its secondary is 110 volts AC.

•L3 is a “Red” indicator installed on the electrical enclosure door. Its function is to indicate the presence of 110 VAC to the sprinkler system.

•Sprinkler High Limit Controller (SHLC) - Its function is to monitor a preset hi-limit temperature (which is currently set to 550º F [287.8º C]) and to control the activation of the “WATER SPRINKLER” circuit.

•SHLC’s (Sprinkler High Limit Controller’s) temperature information is derived from the RTD #4 (Resistive Temperature Device #4), a resistive sensor located on the top right hand side of the tumbler (basket) section. Its exact location is in proximity of the intake and hi-limit temperature probe.

IMPORTANT: An open RTD (Resistive Temperature Device) probe or disconnecting the probe under power will cause the sprinkler to active.

•ALL MLS-460 RTD (Resistive Temperature Device) probes are rated for 1,100º F (593.3º C).

•SHCL #2 (Sprinkler High Limit Controller #2) contacts (alarm and set point) are configured in the normally open state.

•#2CR (#2 control relay) and #3CR (#3 control relay) are relay coils that are energized in a logical manner for circuit control. The following are their associated relay contacts information.

RELAY

NORMALLY CLOSED

NORMALLY OPEN

CONTACTS

RELAYS

 

 

 

 

2C R

2 C RB

2 C R1

 

 

 

3CR

3 CRB

NOT USED

 

 

 

•S11 and S12 are the actual electrical solenoid connections that turn on or shut off the air actuated water valve. The electrical connections for S11 and S12 are located in the solenoid junction box in the burner section of the dryer.

•S11 = Sprinkler ON

•S12 = Sprinkler OFF

IMPORTANT: For proper sprinkler and dryer operation, sprinkler must be powered by a “separate or dedicated” single-phase (1ø) multi-wire branch circuit at dryer’s nameplate voltage.

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Contents MLS-460 Installation/Operator’s Manual Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Contents Service Power MalfunctionsMotors Important Information SectionExplosion could Result Safety PrecautionsPage Specifications SPECIFICATIONS/DIMENSIONSDimensions Installation Procedures Reassembly of DryerReattach The Control Pendant Arm Reassembly Instructions For Dryers Shipped In Three 3 Pieces Page Location Requirements Air Front Tilt Piston and Sprinkler Lines Internal AIR, ELECTRICAL, and Water ConnectionsPage Electric Tumbler Basket Motors Temperature Probe, Base, and Tumbler Basket DisconnectsPage Pendant Left Drum Motor Tumbler Basket Junction Box DisconnectExternal Supply Connections Condensate return line must be 1-1/4 pipe Exhaust Ducting Page Electrical Requirements Electrical RequirementsLatest Edition MLS-460 Steam Electrical Service SpecificationsPage Fresh AIR Supply Requirements Steam Requirements Steam InformationShut Down Instructions Preparation for Operation PRE START-UPClean any lint accumulation from inside the heat console Routine MaintenanceCleaning Suggested Cleaning ScheduleMonthly Tumbler Basket Support and Drive System Component System DescriptionsPage Page Main AIR Blower and Heat Reclaimer System Heat Reclaimer Adjustment Remove Electricity from the Unit Compressed AIR System Page Safety Devices Door Open SERVICE/PARTS Information ServiceParts Returning Warranty Parts Warranty InformationReturning Warranty Cards WarrantyPage Troubleshooting Table of Contents Number TroubleshootingPower Malfunctions Verify red Sprinkler Power on main panel to be illuminatedMain Disconnect Will Not Turn On If NO, refer to paragraph #1 above Sprinkler circuit may be defective Machine Main Power Shuts Down Blue Indicator OffSprinkler Circuit Components 3CR CRB Not UsedSprinkler Circuit Description Page Malfunctioning PLC Programmable Logic Controller Emergency Stop E-Stop Buttons 1, 2,Page General Description PLC Message HI-TEMP FaultPage Page Introduction Tumbler Basket Section Electrical MalfunctionsDrum Rotation Sensor PRS1 Rear Panel Control Problems Emergency Stop E-Stop Function If YES, refer to a If NO, refer to b PLC OUT PIN 1 = Drum Reverse PLC OUT PIN 2 = Drum Forward PLC OUT PIN 7 = Unload Door Open PLC OUT PIN 10 = Front UP DS1-B=LOAD Door Switch DS2-B=UNLOAD Door Switch Wiring Back the PLC Programmable Logic ControllerProbable Solutions Base Section Electrical Malfunctions Wiring Back to the PLC Programmable Logic Controller Lint Drawer Proximity SwitchesPage Probable Causes Tumbler Reverse Pendant --- PB2 Pendant Control MalfunctionsLoad Level Unload Tumbler Reverse Tumbler Forward SEL a = Load SEL B = UnloadTumbler Forward Pendant --- PB1 Wiring Diagram Fuse 4 on Main Electrical Panel Faulty SwitchesWiring Back to PLC Programmable Logic Controller MLS-460 Pendant Assembly DiagramTemperature Sensing Disconnect Plug Faulty Switch Wiring Back to TB1Another Emergency Stop E-Stop Button Exhaust RTD Resistive Temperature Device Sens1 Temperature Sensing Component DescriptionsWith the control voltage OFF Motors Circuit Wiring to the Analog Input ModuleVerify current setting Check circuit Check motor Retest LS-460 Idling LS-460 Running ADC113073 1- 01/14/00-15
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